code: def testSkewKurtNanValue(self):
      p = Pool({"foo": [[0, 1, 2, 3, 4]]})
  
      defaultStats = ["kurt", "skew"]
      results = PoolAggregator(defaultStats=defaultStats)(p)
      YamlOutput(filename="/tmp/foo_pool.json", format="json")(results)
  
      self.assertEqualVector(results["foo.skew"], [0, 0, 0, 0, 0])
      self.assertEqualVector(results["foo.kurt"], [-3, -3, -3, -3, -3])
  
file_path: essentia/test/src/unittests/stats/test_poolaggregator.py
imports: from essentia_test import *
label_desc: Use image node_id 15 for calling the TestPoolAggregator obj's underlying member method code with example usage: obj.testSkewKurtNanValue() without return types